133 citations · 162 across the 6 of their papers we have counts for
6 papers
ACT stands for Awkward Cosmology Theories
Loris Del Grosso, Alfredo Urbano, Marcello Ziccolella
Recent Atacama Cosmology Telescope (ACT) observations, combined with Planck, favor a scalar spectral index in tension with Starobinsky inflation. Two main strategies have been prop…
Insights into the highest natural scale: Finite naturalness challenges inflationary dynamics
Pier Giuseppe Catinari, Loris Del Grosso, Luca Di Giovanni +1
We apply the criterion of finite naturalness to the limiting case of a generic heavy sector decoupled from the Standard Model. The sole and unavoidable exception to this decoupling…
Is the formation of primordial black holes from single-field inflation compatible with standard cosmology?
Sasha Allegrini, Loris Del Grosso, Antonio J. Iovino +1
In this work, we investigate the generation of primordial black holes (PBHs) within the framework of single-field inflationary models and their compatibility with the cosmological…
Gravitational instantons and the quality problem of the QCD axion: Facts, speculations, and statements in between
Pier Giuseppe Catinari, Alfredo Urbano
In this work, we critically reanalyze the explicit breaking of the Peccei-Quinn global symmetry -- and the corresponding corrections to the QCD axion potential -- induced by gravit…
Compact objects in and beyond the Standard Model from non-perturbative vacuum scalarization
Loris Del Grosso, Paolo Pani, Alfredo Urbano
We consider a theory in which a real scalar field is Yukawa-coupled to a fermion and has a potential with two non-degenerate vacua. If the coupling is sufficiently strong, a collec…
From inflation to black hole mergers and back again: Gravitational-wave data-driven constraints on inflationary scenarios with a first-principle model of primordial black holes across the QCD epoch
G. Franciolini, I. Musco, P. Pani +1
Recent population studies have searched for a subpopulation of primordial black holes (PBHs) in the gravitational-wave (GW) events so far detected by LIGO/Virgo/KAGRA (LVK), in mos…